摘要
基于跨唐山断裂带两条深地震物探剖面,建立精细的唐山断裂带三维构造应力场有限元模型,利用GPS及地应力观测结果进行约束;与区域M≥5.0地震震源机制解比对,以检验有限元模拟结果可靠性。对唐山断裂带等效应力场及XY平面剪切应力场的分析认为,唐山断裂带的深部断裂存在孕育较强地震的可能性,唐山断裂带北东段可能继续破裂。
A fine 3-dimensional element model of Tangshan fracture zone based on 2 seismic refraction and re-flection profilings across Tangshan fracture zone was presented. GPS data and tectonic stress observing results were used to constrain the simulation, in the study areawere compared to insure the reliability of the simulation was veri-fied by the comparison of focal mechanism and the element results. Analysis results of equivalent stress and shear stress on the XY plane indicate the seismogenic possibility of Tangshan fracture zone.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第1期38-42,共5页
Journal of Geodesy and Geodynamics
基金
中国地震局地震科技星火计划基金项目(XH14067Y)
中国地震局地震研究所所长基金(IS201266113)
中国地震局第一监测中心预测室基金项目(201304003)
关键词
唐山断裂带
三维构造应力场
震源机制解
数值模拟
地震
Tangshan fault zone
3-dimensional tectonic field
focal mechanism solutions
numerical simulation
earthquake
